受损伤牙根的修复开始于分裂细胞去除牙根表面的矿化物,使之净化,暴露突出的胶原纤维表面,以便新生的牙骨质和牙周附着重新形成。牙根表面酸处理能够使器械制备的牙质产生1～5μm的脱矿,从而去除污染层,暴露牙本质基质的胶原纤维,促进牙骨质生成和愈合,并在其表面生成正常的牙周附着,有利于修复。有研究表明:pH值为1.0的枸橼酸放置在牙根表面1.5～2min,能产生良好的酸蚀效果。因为行活体染 Repair of damaged roots begins by dividing the cells to remove the mineralization of the root surface, decontamination, exposing the surface of prominent collagen fibers so that nascent cementum and periodontal attachment re-form. Root surface acid treatment can make equipment prepared dentin 1 ~ 5μm demineralization, so as to remove the contaminated layer, exposing the dentin matrix collagen fibers, promote cementum formation and healing, and in its surface to generate normal periodontal attachment , Is conducive to repair. Studies have shown that: citric acid pH value of 1.0 placed in the root surface 1.5 ~ 2min, can produce good etching effect. Because living body dyed